public class Circle {
    public static void main(String[] args) {
        final double PI = 3.1415;
        double radius = 1.5;
        double circumference = 2 * PI * radius;
        double area = PI * radius * radius;
        System.out.println("圆的周长为：" + circumference);
        System.out.println("圆的面积为：" + area);
    }
}
